JP3504325B2 - Method and apparatus for controlling butting gauge of bending machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an abutting gauge control method and apparatus for a bending machine such as a press brake, and more particularly to an abutting gauge control method and apparatus for an automatically controlled bending machine such as an NC machine. Is.

[0002]

2. Description of the Related Art A bending machine such as a press brake is generally provided with an abutting gauge called a back gauge apparatus. The abutting gauge is located on the back side of the bending die and is located on the front side. The work is sized and positioned by hitting the tip of the work. This type of abutting gauge is disclosed in Japanese Utility Model Laid-Open No. 59-110123, Japanese Utility Model No. 2
No. 21137, for example.

In the case of a Z-bent work or the like, when the bent step surface of the work is used as a reference plane for the fixed-size positioning,
The tip piece located in front of the bent step surface is dipped under the abutting gauge to abut the bent step surface against the front surface of the abutting gauge. If the distance to the mold is short, the tip piece may not be able to be dipped below the abutment gauge.

Conventionally, in such a case, the work is set by flipping the abutment gauge around the pivot axis by the operator's hand, or by retracting the abutment gauge once from the sizing position and performing the work setting. Either way, it is dealt with.

[0005]

However, the method of splashing the abutment gauge by the operator's hand is inefficient, and particularly when a large amount of bending work is performed, the abutment is performed each time a single operation is performed. Since the gauge has to be flipped up, the work load on the worker becomes large and there is a problem in safety.

The method of temporarily retracting the abutment gauge from the sizing positioning position does not increase the burden on the operator, but an extra operation process called backward movement and return forward movement of the abutment gauge occurs. The tact time increases accordingly.

The present invention has been made by paying attention to the above-mentioned problems, and when the butting gauge interferes with the work set, the burden on the operator is not increased and the tact time is lengthened. It is an object of the present invention to provide an abutting gauge control method and device for a bending apparatus that is improved so as to retract the abutting gauge without doing so.

[0008]

According to the present invention, the above-described object is to interpret the bending condition data including the product processing data, and the abutment gauge located at the sizing position obstructs the work set. If the abutting gauge interferes with the work set, the abutting gauge is flipped up and retracted by an actuator, and the abutting gauge is moved to the regular sizing position by inputting an external signal. It is achieved by an abutting gauge control method for a bending apparatus, which is characterized in that

Further, the abutment gauge control device of the bending apparatus according to the present invention interprets the bending condition data including the product processing data and determines whether the abutment gauge located at the fixed positioning position interferes with the work set. A control device that determines whether or not the actuator, an actuator that flips up and retracts the abutting gauge when the aforesaid controller determines that the abutting gauge interferes with the work set, and returns the abutting gauge to the regular sizing positioning position. And an evacuation canceling means for inputting an external signal to the control device.

In the hitting gauge control device of the bending apparatus according to the present invention, the retraction releasing means is a manual operating means operated by an operator, or a work detecting means for detecting that the work is set in the bending area. May be

[0011]

According to the above-described structure, the control device interprets the bending condition data including the product processing data and determines whether or not the abutting gauge located at the sizing positioning position interferes with the work set. However, when the abutting gauge interferes with the work set, the abutting gauge is automatically flipped up and retracted by the actuator. Then, an abutting gauge returns to the regular sizing positioning position by inputting an external signal for instructing the retraction release to the control device by manual operation or by setting the work in the bending area.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 3 shows a press brake to which the abutment gauge control device according to the present invention is applied. The press brake includes an upper table 3 fixedly mounted on the frame 1,
A lower table 5 is vertically driven by a driving device (not shown), and a punch 7 for bending is attached to the upper table 3, and a die 9 for bending is attached to the lower table 5.

A back gauge device 11 is provided on the inner side of the punch 7 and the die 9, that is, on the left side in FIG. The back gauge device 11 has an abutting base 15 attached to a stretch 13 movable in the left-right direction in FIG.
As shown in FIG. 1, an abutment gauge 19 is attached to the abutment base 15 by a horizontal pivot 17 so as to be capable of being flipped up and rotated. The abutting gauge 19 is drivingly connected to a pistun rod 23 of a fluid pressure cylinder device 21 mounted on the abutment base 15, and the fluid pressure cylinder device 21 causes the horizontal fixed positioning position shown by a solid line in FIG. Then, as shown by the phantom line in FIG. 1, it is rotationally driven to and from the flip-up retracted position which is flipped upward from the horizontal position. If a detailed description of the splashing mechanism of the abutting gauge 19 is required, refer to Japanese Utility Model Laid-Open No. 59-110123.

The press brake has an NC for automatic operation.
The device 25 is connected. As shown in FIG. 1, the NC device 25 includes a data input unit 27, a data memory 29, and an NC execution unit 31.

The data input unit 27 inputs the product processing data describing the bending process order, the work data indicating the plate thickness and material of the processed plate material, and the die data of the punch 7 and the die 9. The data input by the data input unit 27, that is, the bending condition data is stored in the data memory 29.

In this case, the product processing data is input with a description of "with splashing" for a process in which it is necessary to splash the abutting gauge 19 to avoid interference.

The NC execution unit 31 interprets the bending condition data and executes numerical control, outputs a control signal to each unit such as the table drive system, and determines whether each process is a "rebound" process. If it is determined that the process is “with splashing”, a splashing command signal is output to the drive unit 33 of the fluid pressure cylinder device 21.

The NC execution unit 31 inputs a flip-up cancellation signal as an external signal from the foot switch 35, and outputs a flip-up cancellation command signal to the drive unit 33 in response to the input of the flip-up cancellation signal.

As shown in FIG. 3, the foot switch 35 is arranged in front of the press brake and is operated by a worker as a manual operation means.

Next, the operation of the abutting gauge control device will be described with reference to FIG.

First, bending data is input. At the time of inputting this data, the description "with splashing" is input for the process requiring the splashing operation (step 1).
0).

Next, the automatic operation is started (step 2)
0). Upon the start of the automatic operation, the NC execution unit 31 determines whether or not the next process is a process with "spattering" (step 30).

If the process is not "with splashing" (No at step 30), the process jumps to step 70.

When the process is "with splashing" (Yes in step 30), a splashing command signal is output to the drive unit 33 of the fluid pressure cylinder device 21. As a result, the fluid pressure cylinder device 21 operates, and the abutting gauge 19 moves to the position shown in FIG.
From the sizing positioning position shown by the solid line in Fig. 1
In step 40, the fly-back is rotated to the fly-back retracted position indicated by the phantom line.

Thus, in the Z-bent work W as shown in FIG. 1, the bent step surface Wa of the work W is
When using as a reference surface for sizing positioning, bend step surface Wa
The tip piece Wb positioned further forward can be easily made to sneak below the abutment gauge 19.

The NC executing section 31 is in a state of waiting for a signal input from the foot switch 35 (step 50), and the work W
When the foot switch 35 is stepped on by the operator after the setting of (NO in step 50), the NC execution unit 31 inputs the flip-up release signal from the foot switch 35 as an external signal, and the drive unit 33 is activated by the input of the flip-up release signal.
Outputs a lift release command signal. As a result, the operation of the fluid pressure cylinder device 21 is released, and the abutment gauge 19
1 returns from the splash retracted position shown by the phantom line in FIG. 1 to the original sizing positioning position by the solid line in FIG. 1 (step 60).

Under this condition, the bent step surface Wb of the work W
Is abutted against the front surface of the abutting gauge 19 to perform the fixed positioning of the work W.

After that, the NC execution unit 31 interprets the bending condition data and executes numerical control, and outputs a control signal to each unit such as the table drive system. As a result, one bending process is performed (step 70).

When one bending process is completed, the NC execution unit 31 determines whether or not all process bending is completed (step 80), and when all process bending is completed (step 80 positive).
Ends the automatic driving. On the other hand, if all process bending is not completed yet (No at step 80), the process returns to step 30.

In the above embodiment, the abutment gauge 1
A command for returning 9 from the flip-up retracted position to the sizing positioning position is output when the foot switch 35 is stepped on. This command is provided on the frame 1 as shown in FIG. The work set sensor 37 of the expression may detect that the work W is set in the bending region, and may be output by inputting this detection signal.

In this case, the withdrawal of the abutting gauge 19 is automatically released after the work is set without requiring any manual operation.

In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to this, and various embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art.

[0033]

As can be understood from the above description, according to the abutting gauge control method and apparatus for a bending apparatus according to the present invention, the bending condition data including the product processing data is interpreted to determine the fixed-positioning position. Whether or not the abutting gauge that is located interferes with the work set is determined.If the abutting gauge interferes with the work set, the actuator automatically ejects the abutting gauge, and the manual Since the abutting gauge returns to the regular sizing position by operation or by setting the work in the bending area, the bending work that interferes with the abutting gauge when setting the work is safe without increasing the burden on the operator. Moreover, it will be performed efficiently without increasing the tact time.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an abutment gauge control device of a bending apparatus according to the present invention.

FIG. 2 is a flowchart showing an operation flow of an abutment gauge control device for a bending apparatus according to the present invention.

FIG. 3 is a side view showing an embodiment of a press brake to which the butting gauge control device according to the present invention is applied.

FIG. 4 is a side view showing another embodiment of the press brake to which the hitting gauge control device according to the present invention is applied.

[Explanation of symbols] 1 frame 3 upper table 5 Lower table 7 punches 9 dies 11 Back gauge device 15 hit base 19 Hit gauge 21 Fluid pressure cylinder device 25 NC device 31 NC execution unit 3 35 foot switch 37 Work set sensor

Claims (4)

(57) [Claims] 1. A bending condition data including product processing data is interpreted to determine by a control device whether or not an abutting gauge positioned at a fixed size positioning position interferes with a work set. When the work set becomes an obstacle, the abutment gauge is flipped up and retracted by an actuator, and the abutment gauge is returned to the regular sizing positioning position by the input of an external signal. . 2. A control device that interprets bending condition data including product processing data and determines whether or not the abutting gauge positioned at the fixed dimension positioning position interferes with the work set, and the control device. An actuator that flips up the abutment gauge when it is determined that it will interfere with the work set and retracts it, and an escape signal that inputs an external signal to the controller to return the abutment gauge to the regular sizing position. An abutting gauge control device for a bending device, comprising: 3. The abutment gauge control device for a bending apparatus according to claim 2, wherein the retracting release means is a manual operation means operated by an operator. 4. The abutting gauge control device for a bending apparatus according to claim 2, wherein the retracting release means is a work detecting means for detecting that the work is set in the bending area.